Hipster Paul McCartney knows he is quite "cool" okay?
The 'Ou Est le Soleil' chart-stormer responded to questions about whether or not he knew how 'cool' he was (seen here), admitting: "If someone such as Dave Grohl wants me to play with him then I think that's pretty cool, because he's a cool guy and he likes me and he likes my playing and he wants me to sing with him. So that kind of keeps it topped up."
Paul then spoke of some festivals and used the chance to really stress that he's got this whole 'cool' thing down, saying: "A few years ago we did Coachella and that was very cool. I did it for the same reason that we did Glastonbury."
You can't make this stuff up can you folks.